fuel guage

Hello Yesterday i was coming back from a trim and stopped to a gas station since the fuel gauge was going into red. I filled the tank with 15 lit of petrol and when i started the car the arrow didn't move at all. I was surprised and asked the guy at the gas station if theirs pump was putting...

So the other day my A2 1.6 FSI was fine and showing a half tank. Started the car up the day after and the fuel guage slowly went up to full even though I hadn't put any more petrol in the tank. Now every time I turn the key the guage immediately shoots up to the full position. I've tried taking...